第一種:
//code from http://caibaojian.com/js-random-string.html function makeid() { var text = ""; var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; for( var i=0; i < 5; i++ ) text += possible.charAt(Math.floor(Math.random() * possible.length)); return text; }
第二種:不需要輸入字元集合
function randomstring(L){ var s= ''; var randomchar=function(){ var n= Math.floor(Math.random()*62); if(n<10) return n; //1-10 if(n<36) return String.fromCharCode(n+55); //A-Z return String.fromCharCode(n+61); //a-z } while(s.length< L) s+= randomchar(); return s; } alert(randomstring(5))
第三種:支援自訂字元長度和特徵字元集合
function randomString(len, charSet) { charSet = charSet || 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; var randomString = ''; for (var i = 0; i < len; i++) { var randomPoz = Math.floor(Math.random() * charSet.length); randomString += charSet.substring(randomPoz,randomPoz+1); } return randomString; }
Call with default charset [a-zA-Zcharset [0 -9] or send in your own:
var randomValue = randomString(5); var randomValue = randomString(5, 'PICKCHARSFROMTHISSET');
演示截圖
以上就是javascript創建含數字字母的隨機字符串的三種方法總結,有需要的可以參考學習。
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